An external antenna receives the signalĪn outside antenna is installed outside the parking lot which will pick up the signal from the cell tower. This set of devices works according to the following principle. However, if you want to boost a poor mobile signal inside an underground car park in the UK legally and effectively, you’ll need a phone signal booster.
The issue of a bad signal can be solved in different ways, depending on your resources. How Mobile Signal Booster Works inside Parking Systems